onions {} | R Documentation |
The onions
data frame contains 84 sets of observations
from an experiment involving the production of white Spanish onions
in two South Australian locations.
data(onions)
This data frame contains the following columns:
Ratkowsky, D. A. (1983). Nonlinear Regression Modeling: A Unified Practical Approach. New York: Marcel Dekker.
Ruppert, D., Wand, M.P. and Carroll, R.J. (2003)
Semiparametric Regression Cambridge University Press.
http://stat.tamu.edu/~carroll/semiregbook/
library(SemiPar) data(onions) attach(onions) points.cols <- c("red","blue") plot(dens,yield,col=points.cols[location+1],pch=16) legend(100,250,c("Purnong Landing","Virginia"),col=points.cols,pch=rep(16,2))